Tuesday, December 6, 2016
Abstract-A power-adjustable superconducting terahertz source utilizing electrical triggering phase transitions in vanadium dioxide
We report a practical superconducting terahertz (THz) comprising a stack of BiSrCaCuOintrinsic (IJJs) and a vanadium dioxide (VO) tunable with coplanar interdigital contacts. The electrical triggering are observed not only at room temperature, but also at low temperatures, which provides a proof of the electrical triggering. Applying this, the VO is implemented for the independent regulations on the emission powers from the IJJ THz emitter, remaining frequencies and temperatures unchanged. The can be tuned smoothly and continuously within a couple of volts among which the maximum is, respectively, −5.6 dB at 20 K or −4.3 dB at 25 K. Such a power-adjustable radiation including the VO can further expand its practicability in THz systems, like superconducting THz spectrometers.